Solar energy

From wind turbine technicians and forest fire inspectors to urban farmers and new plastics engineers, these positions represent just some of the employment opportunities available as we transition to a cleaner economy.

Someday, solar panels may be light and cheap enough that they could be hung on a clothesline, thanks to a synthetic mineral called perovskite. Physicist Sam Stranks explains the solar-powered science and the challenges that stand in its way.

Here’s a riddle for you: A plane flew for five days and nights, staying airborne for 118 hours. But it didn’t use a single drop of fuel. How? Bertrand Piccard explains.